Adjustable boring and reaming tool.



w. PUHLMIAN.

ADJUSTABLE BOEING AND REAMING TOOL.

' APPLIGATIOH FILED DEC. 18, 1911 1,682,553 Patentefi Dec. 30, 1913.

WILLIAM POHLMAN, or Mrnnnnrown, NEW YORK.

ADJUSTABLE BORING AND REAMING TOOL.

Specification of Letters Patent.

Patented Dec. 30,1913.

Application filed December 18, 1911. Serial No. 866,438.

To all whom it may concern: I

Be it known that I, \VILLIAM POHLMAN,

a citizen of the United States, residing at Middletown, in the county of Orange and State of New York, have invented a new and useful Adjustable Boring and Reaming Tool, of which the following is a specification.

The present invention relates to improvements in adjustable boring and reaming tools, the primary object of the inventionbeing the provision of a tool, the holder portion of which is provided with two sets of radially disposed cutters or tools, each set of which is provided with its individually controlled means whereby the projec-' tion or retraction of its respective set may be adjusted to an exactness, so that the tool may be set at once to the desired diameter and with microi-netric accuracy, in a similar manner as a micrometer gage or caliper, except that the present construction provides one set of tools for cutting the rough portion of the diameter of a bore while the other set is the finishing set.

A further object of the present invention is the provision of an adjustable reaming and boring tool having two sets of adjustable cutters or tools, so disposed with relationto each other as to give the desired original or rough cut and simultaneously the finishing cut, the cutting edges of the respective tool's being disposed at an angle to the longitudinal axis of the tool body and in such relation thereto as to render the sharpening thereof more easy and the adjustment that isthe projection or retraction of the respective tools or cutters, more exact and easy.- v

With the foregoing and other objects in viewwhich will appear as the description proceeds the invention resides in the combination and, arrangement of parts and in the details of construction hereinafter described and'claimed, it being understood that chan es in the precise embodiment of invention erei-n disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings-Figure I is a view illustrating the complete adjustable boring and reaming tool, a portion thereof being shown in elevation while the other portion, approximately the one-half thereof, is shown in longitudinal section taken on a line, whereby a quadrant of the complete tool is removed. Fig. 2 is a longitudinal'sectional view taken on line 22 of Fig.- 3. Fig. 3 is a cross section taken on line 3-3' of Fig. 1. Fig. 4. is a cross section taken on line 4-4 of Fig: 1. Fig. 5*is a sectional view showing one of the upper cutters in elevation and relative to the adjacent portion of the tool.

Referring to the drawings, the numeral 1 designates the main body of the shank of the boring or reaming tool, which is provided with the enlarged lower end or head 1, having the concentric socketor cham her 2 formed in the same and extending into he body of the shank.

Formed in the enlarged portion 1 of the tool carrying body are the two sets of slots or apertures 4: and 5 respectively, in which are slid-ably mounted for retraction and projection the respective cutters or tools 6 and 7. The cutters 6 are disposed so that the cutting ends thereof will assume an angle as clearly shown in- Fig. 1', whereas the cutters 7 are disposed so as to assume an angle of substantially the same degree. The cutters 7 are what are termed the primary or first cutters to perform the reaming operation after the rough cutor bore is made, while" the cutters G are the finishing cutters to produce the desired smooth bore. Although as shown, these cutters are disposed so that one may be used for the first cut and the other for the second cut, itis to be understood that one or the other sets may be used independently of the others. In order to properly adjust the respective cutters 6 s9 as to retract or project the cutting edges thereof the desired distance, the

portion of the shank above the enlargement is screw threaded as at l and mounted for sliding movement within the upper end of the bore 2 thereof, is the concentrically disposed cutter adjusting wedge 8, which is provided with the diametrically disposed slot 9 through the upper end thereof, so as to receive the diametrically disposed bar 10 whose outer threaded ends 11 project through slotted portions 1 of the shank of the tool to engage the threaded portion 12 o the adjusting sleeve or collar 13. This collar 13 is also fitted upon the threads 1,

whereby the rotation of the sleeve 18 will impart a vertical or longitudinally sliding movement to the bar 10 and consequentlythe cylindrical. wedge 8, p the 'wedging portions 14 formed upon the lower portion of th said wedge 8 being disposed to operably engage the inner ends 6"?of the upper setof cutters 6, whereby the lowering of the said wedge 8 will cause the projection of the cutter 6 while the raising thereof will permitthe retraction of the cutters 6. Simultaneously with the action of the wedge 8 upon the inner ends of the cutters 6, the inclined or wedging surfaces and 16 of the respective sleeve 18 and the enlarged portion 1 of the tool holding shank will engage the inclinededges 6" of the cutters 6 and act as a means to insure the locking of the respective cuttei's' G-intheir desired adjusted position.

In order to adjust the respective lower cutters 7 so as to permit the cutting edges thereof to be retracted or projected to the I desired degree, the lower portions of the said cutters 7 are provided with the inclinedwed 'in walls 7 respectivel the walls 7 being normally held in engagement at all times with the inclined wall 5 of the respective slots 5 of the enlarged portion 1 of the ,head of the tool. The adjusting collar or sleeve-17 is fitted upon the lower threaded projectionthereof, a threaded plug 19 carryinga'washer -20"is mounted within thelower threadedend 18 of the bore 2 of the shankand carries" the concentrically disposed feed screw 21- which is carried by the rotatable cap 22 mounted within the plug 19 and provided with means whereby the same may be rotated'to cause the screw 21 to impart the desired movement to the wedging plug23, which is'somewhat similar to the plug 8 and is provided with theinclined upper wedge portion 24: engaging the inclined walls'7 of the respective cutters 7 and thereby coactingfwith the inclined walls 5 of theadjustingsleeve 17, to permit the re- "tractionizand:projection of the respective cutters an'd'the locking thereof in the desired adjusted pos tion.

Each ofthe respective wedging plugs 8 and 23 is providedwith' the respective slots 26.,andj2t3 whichcoact with the respective pins or keys :27 a-nd29 to prevent a rotary mevement efthe respective plugs but permit a sliding mbfvenient thereof within the horse oftheishdnkbf the tool-.- 2

- adjust th'ernxand knowi'exazctly; a' micromes ten: gagfe'the dist 111684015 the projection or re traction;z aasgraduated scale i139 is: formed read :fora

uponthe lower rim or edge "of the upper adjusting sleevev13, and disposed for coaction with the indicator or pointer 24 carried upon the enlarged portion 1; of the tool body I and disposed to project beyond the lower rim of the sleeve 13-above the grad-nations.

vThe lower adjusting sleeve 17 is provided with like micrometer graduations-li while carried by the enlarged body portion 1 of the tool holder is the indicator or pointer 25 similar to the pointer 24 and is disposed to coact with the graduations upon the scale 17*.

By providing the sleeve 13 and the ing sleeve 13, as clearly illustrated, it is evident that the threaded ends of the bar 10 are fully protected so that the fine adjustmentafforded thereby will in no way beinterfered with, the positioning of the sleeve being such that the tool may be adjusted to an exactness, both in retraction and projection without disturbing any of the'interior arrangement of the tool.

From the foregoing description taken in 5 connection with the drawings, it is evident that a bormgor reaming tool constructed according to and embodying the present in-v vention, may be readily and-easily adjusted to project or retract the respective sets'of cutting tools to the desired degree so that the said cutters or tool's-may be actuated and looked in the various desired positions,

and further that by providing each set oftools as herein setforth, the first set enter ing the bore first will ream the rough cut thereof while the second set entering the same will produce a finish. It 'is'also evident that either one'of the said cutters may be used independently, the first set being projected beyond the second set when it is desired to use.v the first set only, or the sec ond set may be projected beyond the first set,

- In operatlon should it be desired to project the respective cutters 6, it is vsimply necessary-to release the locknut 13 and rotate the sleeve 13, so as to move the concentric wedge 8 downwardly, the inclined faces 14 thereof resting upon the inner ends 6 of the respective. cutters 6 so as to project the cutting ends thereof, while simultane; ously with this movement the sleeve-'13 will be raised so that its we'dging surface 15 willride upon the inclined faces 16 of the respective cutters 6 and thus permit the projection of the cutters and yet at the same sleeve 13,-iinrnova time form a coactingwedgingirneansiwith "."the lowerlend' of the pinged tmlock: Jthezcuttersiat thedesirediadjilstmentuupon i In order *th at the; iretractiongand 'proj ec-= tio'nidf the respective cutters-,gmays be: reg'ulatetl 150-321 :nicety, eso thatsthe operator? may?v Zthe stoppagerof the movernentzof; the-sleeve. r :13. .Wheni' the ega get $13? *lindicatesathatr 5 the acutters gate: proj ected 1 :the) ipi opera distayce'u the: lock nnti :is "lojckedisot asabriqholdcthes ble' andithe cutters tiarenow.

iv v c operation is simply reversed causing the ,re-

' ing the wedging surface 7' and 7" of the cutters 7'so as to retract or project the same and retain them in the desired adjustment according to the indication upon the micrometer gage 17 of the sleeve 17.

WVhat is claimed is: I a

A tool of thischaracter, including a shank having an enlarged lower end, the junction between the enlarged portion and the reduced portion being outwardly and downwardly inclined, the enlarged portion and a portion of the reduced portion of theshank being tubular, the reduced portion having diametrically disposed elongated slots communicating with the bore thereof, the portion of the shank above the slots being exteriorly threaded, the shank at the junction of the enlarged portion andin the enlarged portion being provided with a plurality of radial slots, a plurality of cutters disposed for radial sliding movement in the latter slots, each cutter having an inclined edge to correspond with the inclined portion of the shank, an adjusting and locking wedge mounted'slidably in theupper end of the bore of the shank and having a diametrical slot through its body, said slot being of lesser length than the elongated slots of the shank, a bar of greater length than the diameter of the wedge fitting in the slotthereof and-having the outer faces of its ends threaded and disposed through the elongated slots of theshank for sliding movement therewithin, a sleeve having internal threads and an inclined rim disposed for rotation upon the shank adjacentthe enlarged portion the threads engaging the threaded ends of thebar, whereby the bar is moved longitudinally of the shank to project and retract the wedge, the inclined rim coacting with the inclined portion of the shank and the cutters to project-and retract the cutters and lock the same in adjusted position, and a locking sleeve disposed upon the shank and'in c'oactive relation to the upper end of the adjusting sleeve.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

THOMAS MURPHY, T. W. SMlTH. 

